CVE-2022-31053 json
Signature forgery in Biscuit
published 2022-06-13 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-5973 , GHSA-75rw-34q6-72cr , GO-2022-0564 , HSEC-2023-0002
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 63%
- public exploits
- 0
- none known
Summary
Biscuit is an authentication and authorization token for microservices architectures. The Biscuit specification version 1 contains a vulnerable algorithm that allows malicious actors to forge valid Γ-signatures. Such an attack would allow an attacker to create a token with any access level. The version 2 of the specification mandates a different algorithm than gamma signatures and as such is not affected by this vulnerability. The Biscuit implementations in Rust, Haskell, Go, Java and Javascript all have published versions following the v2 specification. There are no known workarounds for this issue.
Patch / fix
- crates.io biscuit-auth 2.0.0
- go github.com/biscuit-auth/biscuit-go 2.0.0
- maven com.clever-cloud:biscuit-java 2.0.0
- hackage biscuit-haskell 0.2.0.0
- biscuitsec biscuit-go 2.0.0
- clever-cloud biscuit-java 2.0.0
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- total
- Assessed
- 18 mo ago
Exploit prediction
1.03% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/biscuit-auth/biscuit/security/advisories/GHSA-75rw-34q6-72cr referenced PoC, tagged "exploit" by a source, unverified
- eprint.iacr.org https://eprint.iacr.org/2020/1484 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| OSV | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | biscuit-auth | >=1.0.0, <2.0.0 |
2.0.0 |
| go | github.com/biscuit-auth/biscuit-go | <2.0.0 all versions |
2.0.0 |
| maven | com.clever-cloud:biscuit-java | <2.0.0 |
2.0.0 |
| hackage | biscuit-haskell | >=0.1.0.0, <0.2.0.0 |
0.2.0.0 |
Affected products
- biscuit-auth biscuit
Classification
- Weakness
-
- CWE-347 Improper Verification of Cryptographic Signature
References
-
github.com
/biscuit-auth/biscuit/security/advisories/GHSA-75rw-34q6-72cr
web, exploit, third-party-advisory, advisory
-
eprint.iacr.org
/2020/1484
web, exploit, technical-description, third-party-advisory, report
-
nvd.nist.gov
/vuln/detail/CVE-2022-31053
advisory
-
github.com
/advisories/GHSA-75rw-34q6-72cr
advisory
-
github.com
/biscuit-auth/biscuit
package
-
pkg.go.dev
/vuln/GO-2022-0564
web
Sources
- CVE List CVE-2022-31053
- GitHub Advisory GHSA-75rw-34q6-72cr
- NVD CVE-2022-31053
- OSV GO-2022-0564
- OSV HSEC-2023-0002
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